CVE-2022-48828 (GCVE-0-2022-48828)

Vulnerability from cvelistv5 – Published: 2024-07-16 11:44 – Updated: 2026-05-12 10:12
VLAI
Title
NFSD: Fix ia_size underflow
Summary
In the Linux kernel, the following vulnerability has been resolved: NFSD: Fix ia_size underflow iattr::ia_size is a loff_t, which is a signed 64-bit type. NFSv3 and NFSv4 both define file size as an unsigned 64-bit type. Thus there is a range of valid file size values an NFS client can send that is already larger than Linux can handle. Currently decode_fattr4() dumps a full u64 value into ia_size. If that value happens to be larger than S64_MAX, then ia_size underflows. I'm about to fix up the NFSv3 behavior as well, so let's catch the underflow in the common code path: nfsd_setattr().
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < d2211e6e34d0755f35e2f8c22d81999fa81cfc71 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 38d02ba22e43b6fc7d291cf724bc6e3b7be6626b (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 8e0ecaf7a7e57b30284d6b3289cc436100fadc48 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < da22ca1ad548429d7822011c54cfe210718e0aa7 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < e6faac3f58c7c4176b66f63def17a34232a17b0e (git)
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Linux Linux Affected: 2.6.12
Unaffected: 0 , < 2.6.12 (semver)
Unaffected: 5.4.295 , ≤ 5.4.* (semver)
Unaffected: 5.10.220 , ≤ 5.10.* (semver)
Unaffected: 5.15.24 , ≤ 5.15.* (semver)
Unaffected: 5.16.10 , ≤ 5.16.* (semver)
Unaffected: 5.17 , ≤ * (original_commit_for_fix)
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  }
}


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Taxonomy of the tags.




Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.